Guarding attachment for thread cops



. R. N. CORTHELL GUARDING ATTACHMENT FOR THREAD cors Filed April 5, 192e f Tl A 1 l n /4 /7 Patented Aug. 17, 19255.

Unirse stares ROBERT N.' CDRTHELL, OF AUBURN, MANE, .ASSIGNOB TO SUMMIT '.'DIjCREAD COMPNY' rerum aerien.

GF. EAST HAMPTQN, CONNECTICUT, A CORPORATION' 0F MAINE.

e-joixn'nlne ATTACHMENT ron, THREAD cors.

Application lfd April 5 This application isa vcontinuation inpa-rt of my application 'filed November 16,1925, Serial No. 69,303.

The invention relates to a thread cop which includes a tubular core, and a thread body wound thereon and composed of universally wound layers, the cop being adapted to be supported by a stand which in cludefs'a base and a spindle extending into the core, the stand permitting the rotation oi the cop by the pull of the thread vunvvound therefrom.

Itis customary to provide at the inner vend of the cop, a guard interposed between Ysaid end and the stand base, andradapted to pre;

broken away.

Figure 2jis a sectional view on line '2 2 of Figure 1.

Figure' 3 is a `view similar to Figure 2, showing'a 'ino'diiicatiom an end portion oit the copbeing shownin section.

vFigure 11 is a vperspective view, showing one member of the two-part base portion hereinafter described.

Fi'ure 5 1s a )la-n view showin@ the blank i C: .7. b

from which the member shown by Figure 4 may bey made.

Figure'5fl is a'nio'dfic-ation of Figure 5.

Figure 6 isa perspective view ot" a `diierent-ly constructed guarding attachment einbodying the invention.

Figure 7 is a' section on line 7*7 oi Figure 6'.

Figure Sshovvs in *section an end portion Q f a 'C9135 and e guarding 'attalimeht C011- Astitnting another "embodiment of ,the inventien, engaged' with e @QP- 192e. serial no. sensa.

Figure 9 shows in perspective the split ring shownby Figure 8.

Figures 1 t0 tshow the device enlarged from the usual size, which is indicated by iigures 6, 7 and'8. i

'ilhesame reference characters indicate the same parts in all of the `figures;`

A thread cop'with which my attachment is used includes a tubular core unusually 'of paper, and epen fromendV to end, and a thread winding" or body b usually t composed of universally wound layers, the body 'being cylindrical and having substantially flat ends. When' in use the `siipported by `a sta-nd including` a base. and a spindle,

the latter extendingfrom the base'into' the core. A' i Fach of the hereinafter described lembodiments oiI my invention comprises an annular' head, ilormedto bear on'an end of thej'cop and providedwith' acentral opening to 're ceive the spindle, and a clutch includ-infr a series of `itiezfzible tongues ,supperted' the "head, projecting upward frein the'mazrgin of the head opening and adapted,tof'enterthe core a, anda normally vexpanded Ysplit ring engaged with the tongues'*andfadapted to enter the core,'.the ring being -contracted from its nermal'diameter, 4,wheninserted in thev cere, so that jits ,efort'to enpa-nd; causes the `clutclrtofrictionally engage ,the internal surfaee ofthe core,` maintainfthe headr in Contact withthe cop, and permit the removall ofthe attachment from the cop for use'with another cop.. e Y

In the embodiment of the invention shown by Figures 1 and 2,' thehead .includes an ai'inular facing portion oi Alcompresfsible material, Vsuch as sheetV felting contac tingl withthe cop', and two-'part base portion including an annular member'l otjsheet metal, and an annular member 13L cinenmetallic material, such as ber-board, which is stiffer l than the fackltingk portion `12, supports all parts of the facing portion. .and is supported by the member 13,.V the llatter being narrower than the member 13?, shown by Figure 2. If desired, however, the member 13 may be emitted', theinember r13 being of suiiicient width to support .all parts of the member 12, as by HNI tral opening 15, and is provided with a plurality of integral clamping tongues 141, projecting outward from the opening and pressed downward upon the facing portion 12, to confine it in place.

The clutch Yabove mentioned includes a plurality of flexible unstandingtongues 16, integral with the member 13, and projecting upward from the margin of the opening 15, and provided with outer hooks 17, and inner hooks 1S, and a normally expanded split ring 19, engaged with said hooks, as shown by Figures 2 and 3. Figure l ,shows the relative positions of the tongues 1a and 16 when they are engaged with the facing portion 12 and split ring 19, said facing por-V tion and ring being omitted from this figure.

rlhe ring is compressed and the tongues 16 are sprung slighly inward, when the clutch is forced into the core, and the effort of the ring to expand causes the clutch to frictionally engage the internal surface of the core. The frictional engagement permits the rcmoval of the attachment from the cop, so that it may be engaged withv another cop.v

The member 13, tongues 14 and 16, and hooks 17 and 18 may be formed from the d'iscoidal blank shown by Figure 5, portions of which are removed to form an opening 20, defining the margins of the tongues and portions of the margin of the opening 15, the opening being completed by the operation of bending the tongues, as shown by Figurefl. Margins of the inner hooks 18 are formed by annular slits 21, said hooks being offset inwardly from the tongues 16, as shown by Figure 4t. y

The invention may be embodied as shown by Figure 6, in which the'headv is composed of an annular compressible facing portion 22, and an annular rigid base portion 23.

The clutch is composed of a plurality of upstanding flexible fingers 211, integral with a sheet metal ring 25, bearing onk the upper side of the facing portion 22, and a split ring 26, grasped by hooks 27 on the free ends of the fingers. The clutch is frictionally engaged with the internal surface of the core a, in the manner already described. The ring 25 is provided with integral tongues 28,'which extend through the central open? ing of the head and are bent outward against the under surface of the base portion 23. The ring 25 and tongue 28 clamp the facing portion and base portion together.

The embodiment shown by Figures 7 and 8 includes an annular sheet met-al head 30. adapted to bear on an end of the cop, and provided with a central opening. The clutch is formed by a plurality of upstanding flexible fingers 31, integral with the head and arranged tobear on the internal surface of the core, and a resilient split ring 32, the periphery of which bears on the vinner sides of the tongues 31, and is engaged therewith only by friction, 'and not positively, as in the other embodiments. The normal diameter of the ring is such that the ring may be forced into lthe opening of the head, and slightly contracted by contact with the tongues, the ring acting, by its effort to expand, to press the tongues 31- out ward into frictional engagement with the internal surface of the core. The frictional engagement of the tongues with the core thus caused, is sufiicient to maintain the attachmentin operative engagement with the core, under all conditions of use, and to .permit its separation from the core. The head 80, in this instance, has an annular marginal upstandingY flange 33, surrounding the lower end of the cop.

It will now be seen that in each of the described embodiments of the invention, ilexible tongues and a splitring constitute a clutch adapted to frictionally engage the internal surface of the core, the clutch being compressible by the core, and frictionally engaged with the internal surface thereof. It will be seen that in the preferred embodimentshown'by Figures 1 to L1, the

tongues 16 having the spaced apart outer and inner hooks 17 and 18, are adapted to support a split kring 19, of considerable width, so that the clutch has a firmer engagement with the core a than when the split ring is relatively narrow and is supported only by t-he outer ends of the tongues as shown by Figure 6. Provision may be made for the employment of a still wider split ring, by forming the blank as shown by Figure 5arthe form and arrangement of the tongues 16 being such that the tongues are longer in proportion to the diameter of the central opening than is possible when the blank is formed as shown by Figure 5.

I claim:

1.- For use with a thread cop which includes a tubular core and a thread body wound thereon, a guarding attachment comA prising an annular head formed to bear on an end of the -cop and provided with a central opening, and a clutch including a series of flexible tongues supported by the head and projecting upward from the margin of said opening, and a normally expanded split ring engaged with said tongues, the

ring being contractible from its normal said opening, the tongues being provided with ring-grasping means, and a normally expanded split ring grasped by said means, the ring being contractible from its normal diameter, so that its effort to expand causes the clutch to fretionally enga-ge the internal surface of the core.

23. For use with a thread cop which includes a tubular core and a thread body Wound thereon, a guarding attachment oomprising an annular head formed to bear on the end of the cop and provided with a central opening, and a clutch including a series of flexible tongues supported by the head and projecting upward from the margin of said opening, and a normally expanded split ring engaged With said tongues, the ring being oontractble from its normal diameter, so that its effort to expand causes the clutch to frictionally engage the internal surface of the core, the tongues being provided with opposed outer and inner hooks, respectively grasping the outerI and inner edges of the ring.

4. For use with a thread cop which includes a tubular core and a thread body Wound thereon, a guarding attachment comprising a head formed to bear on an end of the cop,- and provided With a cent-ral opening, the head including an annular facing` portion of compressible material contacting with the cop, and an annular base portion supporting the facing portion and provided with a series of integral outwardly projecting clamping tongues confining the facing portion, and With a series of upstanding flexible tongues having ringgrasping means, anda normally expanded split ring grasped by said means, the upstanding tongues and the ring constituting a clutch projecting upward from the margin of the head opening, the ring being contractible from its normal diameter, so that its effort to expand causes the clutch to frietionallyengage the internal surface of the core.

A guarding attachment as specified by claim 4, the upstanding tongues alternating with the clamping tongues and having outer hooks grasping the outer edge of the split grasping the innerring, andv inner hooks edge of said ring.

In testimony whereof I have aiixed my signature.

ROBERT N. CORTHELL. 

